Inking mechanism for rotary printing presses



7 Sept. 7, 1937. H. J. LUEHRS INKING MECHANISM FOR ROTARY PRINTINGPRESSES Filed April 2, 1956 2 Sheets-Sheet 1 INVENTOR fit m ATTORNEYSSept. 7, 1937. H. J. LUEHRS INKI NG MECHANISM FOR ROTARY PRINTINGPRESSES Filed April 2, 1936 2 Sheets-Sheet 2 INYENTOR ATTORNEYS PatentedSept. 7, 1937 UNlTE. it sr res PATENT OFFICE INKING MECHANISM FOR,ROTARY I PRINTING PRESSES Application April 2,

9 Claims.

The object of my invention is to provide means operatively connected toboth ends of the ductor roll whereby the ductor roll may be positivelyvibrated at high speed without the tendencies to bounce. It alsoeliminates the twisting action which was inherent in ductor rolls thatwere driven by means of a shaft from one end only and by a combined camand spring action.

A further object is to provide means whereby the opposite ends of theductor roll may be independently adjusted radially and/or laterally toaccurately position the ductor roll with respect to its fountain anddistributing rolls even though the ductor roll becomes changed in sizeor shape.

My invention comprises an inking mechanism for rotary printing pressesin which a ductor roll is mounted at its ends in levers which arepivoted to independently adjustable brackets, to Which brackets arepivoted cam operated levers adjustably connected to the said ductor rollcarrying levers, thereby permitting independent radial and lateraladjustments of both ends of the ductor roll with respect to its coactingrolls and the positive vibration of the ductor roll without a torsionalstrain thereon.

A practical embodiment of my invention is represented in theaccompanying drawings, in

which Fig. 1 represents a detail top plan View of that part of an inkingmechanism which includes my invention;

Fig. 2 represents a detail side view of the same;

Fig. 3 represents a detail horizontal section, taken in the planes ofthe line IIIIII of Fig. 2, looking in the direction of the arrows;

Fig. 4 represents a detail vertical section, taken in the plane of theline IVIV of Fig. 2, looking in the direction of the arrows; and

Fig. 5 represents a detail horizontal section, taken in the plane of theline V-V of Fig. 4, looking in the direction of the arrows.

The ink fountain is denoted by I and its fountain roll by 2, which rollmay be driven in the usual manner and at the desired speed by any wellknown or approved means, not shown herein.

The shaft 3 of the ink distributing roll l is rotatably mounted in theframe 5, which shaft may be operatively connected to the cam shaft 6which is also mounted in the frame 5, through the train of gears 'I, B,9, Ill, II, in the usual manner.

The opposite ends of the shaft I2 of the ductor roll I3 are mounted forindependent adjustment 55 as follows: Each end of the ductor roll shaft1936, Serial N0. 72,283

I2 is rotatably mounted in the uprising arm I4 of a two armed rock leverI5pivoted to swing on a stud I6 projecting from a bracket Il. Thisbracket Il may be vertically adjustable as, for

instance, by pivoting the bracket on a pivot bolt which slot a bolt 2|extends into the frame 5.

A swinging nut 22 is carried by the bolt 2|, which nut is engaged by thethreaded shank of an adjusting screw 23 rotatably mounted in a lug 24projecting from the bracket H.

The means which I have shown for rocking each of the levers I5 tovibrate the ductor roll I3 without a torsional strain thereon is asfollows: The cam shaft has .fiXed thereon two box cams 25, each camhaving a suitably shaped annular groove 26 in which travels a stud orroller 2'! carried by one arm 28 of a two armed rock lever 29 pivoted onthe stud I6 projecting from the bracket l1.

The means which I have shown for independently adjusting the positionsof the rock levers I5 is as follows:

A depending arm 30 of the cam operated lever 29 is located adjacent toand in substantial alinement with the depending arm I9 of the ductorroll rock lever I5. This arm I9 is provided with a stud bolt 3| whichextends through a slot 32 in the depending arm 30 of the cam operatedlever 29, which slot is concentric with the stud I6 of the said lever.oppositely disposed adjusting screws 33, 34 are carried by the lever arm3|] in position to engage the opposite sides of the stud bolt 3| wherebythe adjustment of these screws will change the relative positions of thearms I9 and 300i the levers I5 and 29 and thereby the lateral positionof the ductor roll I3.

It will thus be seen that I have provided means whereby each end of theductor r011 may be adjusted radially and/or laterally to bring theductor roll into exact contact throughout its length with its coactingrolls as the ductor roll is vibrated, even though the shape and size ofthe ductor roll be changed due to the use of the ductor roll. The radialand/ or lateral adjustment of the ductor roll will ensure the eventransfer of the ink in the desired amounts from one of its coactingrolls to the other of its coacting rolls.

It will also be seen that the positive operation of both of the ductorroll carrying levers prevents torsional strain on the formerly usedductor roll shaft. This positive operation of the ductor roll alsoensures its even and positive movement and eliminates the bouncing ofthe roll which is liable to happen where the roll is operated at high 5speeds under a cam and spring control at one end of the roll.

It is evident that various changes may be resorted to in theconstruction, form and arrangement of the several parts withoutdeparting from the spirit and scope of my invention, and hence I do notintend to be limited to the particular embodiment herein shown anddescribed, but what I claim is:

1. In an inking mechanism for rotary printing presses, a frame, twobrackets independently adjustable thereon, two ductor roll leverspivoted on said brackets, a ductor roll mounted at its ends in saidlevers, and means operatively connected, through said levers, to theopposite ends of said ductor roll for vibrating it.

2. In an inking mechanism for rotary printing presses, a frame, twobrackets independently adjustable thereon, two ductor roll leverspivoted on said brackets, a ductor roll mounted at its ends in saidlevers, and means operatively connected, through said levers, to theopposite ends of said ductor roll for vibrating it, said meanscomprising two cam operated levers pivoted on the same axes as theductor roll levers and connected thereto.

3. In an inking mechanism for rotary printing presses, a frame, twobrackets independently adjustable thereon, two ductor roll leverspivoted on said brackets, a ductor roll mounted at its ends in saidlevers, and means operatively connected, through said levers, to theopposite ends I of said ductor roll for vibrating it, said meanscomprising two cam operated levers pivoted on the same axes as theductor roll levers and adjustably connected thereto.

4. In an inking mechanism for rotary printing presses, a frame, twoindependently adjustable brackets pivoted thereon, two ductor rolllevers pivoted on said brackets, a ductor roll mounted 45 at its ends insaid levers, and means operatively connected through said levers to theopposite ends of said ductor roll for vibrating it.

5. In an inking mechanism for rotary printing presses, a frame, a ductorroll, and means for independently adjustably supporting and positivelyvibrating each end of the ductor roll, said means comprising anadjustable bracket pivoted on the frame, a ductor roll lever pivoted onthe bracket and a cam operated lever pivoted on the same axis as theductor roll lever and connected thereto.

6. In an inking mechanism for rotary printing presses, a frame, a ductorroll, and means for independently adjustably supporting and positivelyvibrating each end of the ductor roll, said means comprising anadjustable bracket pivoted on the frame, a ductor roll lever pivoted onthe bracket and a cam operated lever pivoted on the same axis as theductor roll lever and adjustably connected thereto.

7. In an inking mechanism for rotary printing presses, a frame, a ductorroll, and means for independently adjustably supporting and positivelyvibrating each end of the ductor roll, said means comprising anadjustable bracket pivoted on the frame, a stud projecting from thebracket, a ductor roll lever and a cam operated lever both pivoted onsaid stud and means connecting the two levers.

8. In an inking mechanism for rotary printing presses, a frame, a ductorroll, and means for independently adjustably supporting and positivelyvibrating each end of the ductor roll, said means comprising anadjustable bracket pivoted on the frame, a stud projecting from thebracket,

a ductor roll lever and a cam operated lever both pivoted on said studand means adjustably connecting the two levers.

9. In an inking mechanism for rotary printing presses, a frame, a ductorroll, and means for independently adjustably supporting and positivelyvibrating each end of the ductor roll, said means comprising a bracketpivoted on the frame, separate means for adjusting the position of thebracket and operatively connected ductor roll, cam operated leversmounted on the bracket to swing on the same axis and means for adjustingthe angular positions of the two levers with respect to each other.

HANS J. LUEHRS.

